*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* 禁止选中 */
    user-select: none;
}
.slider-container{
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(rgb(248, 248, 245), rgb(28, 100, 158));
}
.slider-wrapper{
    width: 640px;
    height: 360px;
    position: relative;
}
.slider-wrapper .btn{
    border-radius: 50%;
    width: 60px;
    height: 60px;
    background: white;
    position: absolute;
    text-align: center;
    line-height: 60px;
    font-size: 20px;
    top: 150px;
    cursor: pointer;
}
.left{
    left: 0;
}
.right{
    right: 0;
}